Update terracotta interactive web client dependencies

[DenizYil]

I noticed that the web-viewer is using quite outdated dependencies and that the code could be cleaned up quite a bit. Material UI upgraded to version 5 a few years ago and has since made large improvements. It's now known as Mui.

There are some dependencies that should be moved under devDependencies as well, such as typescript and @types/geojson.

[DenizYil]

@dionhaefner if you agree with this, I can get a PR ready for it. I work primarily with Material UI within DHI and have worked a lot with Razvan, so I can easily get this up and running if you'd like :)

[dionhaefner]

I wouldn't call this a priority but of course you're welcome to do this 👍